Padlock



S. R. FRAIM PADLOCK Filed June 1'7, 1924 2 Sheets-Sheet 1 Patented May 19, 1925.

SAMUEL n. FRAIM, or ancasrnn, PENNSYLVANIA.

PADLO'GK.

Application filed June 17, 1924. Serial No. 720,658.

To all whom it may concern:

Be it known that I, SAMUEL R. FRAIM, a citizen of the United States, residing at Lancaster, in the county of Lancaster and State of Pennsylvania, have invented certain new and useful Improvements in Padlocks, of which the following is a specification.

This invention relates to padlocks in general and more particularly to such a padlock adaptable foruse in locker systems where a small padlock is required and made np'in' a large number of key changes, all operable by a master key.

An object of this invention is to provide a padlock of this character referred to, which will be simple and efficient in its operation, readily disassembled and assembled.

Another object of this invention is to provide a locking mechanism to include a master lever and a plurality of change levers, the latter being interchangeable or adapted to have substitutions made therefor either in part or entirely to beoperable independently of the master lever, by various keys, the master lever being at all times operable by a master key independently of the change levers.

iVith the foregoing and other objects in view, the invention consists in the combination and arrangement of parts and in the details of construction hereinafter described and more particularly set forth in the appended claims, certain embodiments of my invention being illustrated in the accompanying drawings, in which: 7

Figure 1 is a front elevation of the padlock with the upper half of the casing removed, showing the shackle 1n locked position;

Figure 2 is a similar view showing the shackle in unlocked position;

Figure 3 is a similar view of the casing showing the locking bolt and master lever in position with theremainder of the mechanism removed;

Figure 4 is a similar view showing the locking bolt and bolt lever in position;

Figure 5 is a view in perspective of the locking bolt;

Figure 6 is a detailed View of master lever;

Figure 7 is a detailed view of all the change levers disassembled, showing the different locations of their single notches:

is a detailed view of the master ings, the padlock consists of a casing, the lower half of which is shown in the drawings at 6, and is provided with studs 7, 8, 9 and 10.

The locking mechanism consists mainly in a locking bolt 11 with its actuating levers which Wlll' be described later. Referrlng to Figure 5 the locking bolt 11 being pivotally mounted on the casing studhas a recess 12 in its lower side, in which recess a plunger 13 extends through the hole 14 in the bolt. The bolt' also hasa notch 15 adapted to engage the notch 16 in the toe of the shackle 17, while a lug 18 isarranged onthe opposite side of the bolt. v

A bolt lever- 19 with an elliptical inclined slot 20 is mounted on the stud 9 so that the lever may slide on the stud. The lever 19 is provided at its other end with a hole to receive the plunger 13 of the bolt 11 while the lever is fitted in the recess 12in such a manner that a sliding'movement of the lever rotates thejbolt about its pivot a bearing surface whereby a'keymay effect the movement referred to above."

Placed upon the bolt lever l9 is a master lever 22 pivotally mounted on the casing stud 8 by'means of the hole 26, an elliptical slot 23 being arranged in the master lever to receive the casing stud 9 which limits a pivotal movement of the lever 22. The master leveris also provided with anupturned flange 24,,the purpose of which wi-l appear later in the description. Five change levers 1, 2, 3, 4 and 5 are provided, having ellipticalslots 31, 36, 41, 46 and 51; holes 32, 37 42,47 and 52; notches 34,39, 44, 49 and 54; projections 35, 4 0, 45, and'55; and leaf springs 33, 38,43, 48 and 53 respectively. The notches and projections in each change lever have a difierent location so that the wards 65, 66, 67, 68 and 69 of the key will actuate their corresponding change lever'in such a manner as to bring the notches 34, 39, 44, 49 and 54 flush and be engaged siinultaneonslyby the bolt lug 18. In this specific showing the stud. 10. An ekcentric projection 19' forms levers l to 5, inclusive, are placed upon the master lever in the order mentioned being placard qruued 01 6 pugs eq' uodn .meq s1o s pivoted on the stud 8 while their elliptical their common pivot 8. A plate 58 is super movement of all the change levers about imposed upon the lever and is mounted stationary but removable on the studs 8, 9

' and 10.

about the stud 7 and connected to the heel of the shackle, the spring 57 bearing on the stud 9 for normally forcing the toe upwardly about the shackle heelas a pivot.

A key bearing 70 havinga slot 71 for receiving either the key 59 or, 60is mounted in the perforation in the casing. It will ;b e'understood from the foregoing descriptionthat when either key is used, a certain ward on the lower part of the bitengages the. bearing surface 19 of the bolt lever 19 .as 'thekey is rotated on its axis in the key bearing 70. -As the bolt lever 19 moves to the right it is guided by means ofits elliptical slot 20 sliding on the stud9, and forced byfthe' key, the bolt 11, by. means of its plunger 13 fitting in the hole 12 of the bolt" lever, is drawn back out of engagement with the notch 16 of the shackle toe. The bolt is retained in its unlocked position by the spring-56, the top of the bolt being milled off at its heel or stud end. The change levers 1, 2, 3, 4 and 5 being arranged in theorder named .on top of the master lever 22 are alike with the exception of the location of the respectivechange notches 84, '89, 44, 49 and 5 4 and their extensions 35, 40,45, 50 and 55, respectively. which areadapted to be engaged by the flange 24 0]": the master lever 2E2. The extensions are so'arranged that the ward 62'on the bit of the master key 59 raises the master lever 22. r

The flange 24 of the masterv lever then engages the projections 35, 40, 45, 50 and of the change levers 1, 2, 3, 4 and 5, and

raises thechange levers so that all of the" notches 34, 39, 44, 49 and 54'will register with the dog or lug 18 of the locking bolt 11.

stitutes suflicient movement to cause the The. movement of the bolt caused by the spring 56 in engaglng these notches connotch 15 of the bolt to disengage the corresponding notch 16 of the toeo't the shackle, releasing the shackle toe which is forced out of the casing by the action of the spring-57.

The plate 58 is placed over the uppermost change lever 5 simply as a filler plate. How'- ever, it may readily be used in connection, with other master key change combinations by locating it in different positions interposed between any selected two of the change levers. In this case the key bearing surface on the plate would extend to a certain radius whereby the ward on the key bitting would just pass through.

In the regular operation of the padlock using the standard change key, the ward, on

the key, which could register with the mas ter lever is cut down sufliciently to either pass by it entirely without touching it or.

moving it slightly (not enough to allow the flange 240i the master lever 22 to engage any of the change lever extensions). The change levers'are accordingly raised by the action of their respective wards on the key bittings as already described. In this .con-

nection it will be observed that I have illustrated the master lever/22 as not being provided with a notch to register with the notches in the change levers. The front faces of the, change levers extend beyond that of'the master lever so as not to interfere with the engagement of the bolt lug 18 with the change levernotches.

The master key 59is cut away at 53, al-

lowing the ward 62-to engage the master lever and the bolt lever, the cut away portion .63 being for. the purpose of preventing themaster key from engaging any of the change levers. Thus theward 62 by means of a rotation of the master key'to theright simultaneously actuatesithe. bolt lever 19 to retract the locking bolt 11 from engagement with the shackle toe, and engages and raises the'flangeQA, forcing the master lever: together with the-change levers so that the 3 bolt lug 18 engages the change lever notches to effect an unlocking as described.

This simplicity and eificiency of thisconstruction is apparent, in that the regularkey operates the change levers alone, the master lever not being used :at all; while the master key operatesthe lock throughthe medium. of the master lever alone and does not engage the change levers directly, the master lever bemgrehed on .to raise the same.

It wil'l be understood that'while I have described .and illustrated certain combinations and arrangements of parts, I do not wish to limit my invention to such specific disclosures, but only in so far as tofall within thescope of the appended claims.

I clainr- 1. A padlock comprising, in. combination,

a casing, a shackle pivotally mounted therein, a sliding bolt lever, a locking bolt also pivotally mounted in said casing and adapted to be actuated bysaid bolt lever to engage and disengage said shackle, a master lever, and a plurahty of change levers spring pressed to normally prevent retrac-.

tion of said locking bolt, said change levers being provided with selectively located notches to register with a corresponding dog on said bolt to allow the retraction of the latter, said change levers being operable independently of said master lever, and said master lever being operable alone to actuate all of said change levers.

3. A padlock, comprising a casing and a shackle pivotally mounted therein, a locking bolt pivotally mounted in said casing and adapted to engage said shackle, a sliding bolt lever for moving said bolt into and out of locking position, a master lever, flange, a plu' provided with an upstanding rahty of change levers spring-pressed tonormally prevent retraction of said locking bolt, said master and change levers being mounted on a common axis, said change levers being provided with selectively located notches to register with a corresponding dog on said bolt to allow the retraction of the latter, all of said change levers being projections directly beneath their notches, said change lever being operable independently of said master lever, and said master lever being operable alone toactuate all of said change levers by means of the flange of the latter engaging the projections of the former. r

4. A padlock comprising, in combination, a casing a shackle pivotally mounted therein, a sliding bolt lever, a locking bolt also pivotally mounted in said casing and adapted to be actuated by said bolt lever to engage and disengage said shackle, a master lever, and a plurality of change levers mounted on a common axis and adapted to regulate the movement of said locking bolt, said change levers being operable independently of said master lever, the latter being operable alone to actuate all of said change lever said bolt lever having an inclined slot whereby it is slidably mounted on a stud of said casing, said bolt lever being connected to said bolt and having a bearing surface adapted to be engaged by suitable change and master keys for retracting said bolt from said shackle when the change levers are in the proper position to allow such movement of the bolt.

5. A padlock, comprising a casing and a shackle pivotally mounted therein, a looking bolt for engaging said shackle, a sliding bolt lever for moving said bolt into and out of locking position, a master lever and a plurality oi" change'levers mounted on a common axis, said change levers being spring pressed to normally prevent retraction of said locking bolt, said change levers being provided with selectively located notches to register with a corresponding dog on said bolt to allow the retraction of the latter, said change levers being operable independently of said master lever, and said master lever being operable alone to actuate all of said change levers, said bolt lever having an inclined slot whereby it is slidably mounted on a stud of said casing, said bolt lever be ing connected to said bolt and having a bearing surface adapted to be engaged by suitable change and master keys for retracting said bolt from said shackle when the change levers are in the proper position to allow such movement of the bolt.

6. A padlock, comprising a casing and a shackle pivotally mounted therein, a locking bolt pivotally mounted in said casing and adapted to engage said shackle, a sliding bolt lever for moving said bolt into and out of locking position, a master lever provided with an upstandingflange, a plurality of change levers spring-pressed to normally prevent retraction of said locking bolt, said master and change levers being mountedon a common axis, said change levers being provided with selectively located notches to register with a corresponding dog on said bolt to allow the retraction of the latter, all of said change levers being projections directly beneath their notches, said change lever being operable independently of said master lever, and said master lever being Op 1 erable alone to actuate all of said change levers by means of the flange of the latter engaging the projections of the former, said bolt lever having an inclined slot whereby it is slidably mounted on a stud of said casing, said bolt lever being connected to said bolt and having a bearing surface adapted to be engaged by suitable change and master keys for retracting said bolt from said shackle when the change levers are in the proper position to allow such movement of the bolt. 7. A padlock comprising, in combination, a casing a shackle pivotally mounted therein, a sliding bolt leveiga locking bolt also pivotally mounted in said casing and adapted to be actuated by said bolt lever to engage and disengage said shackle, a master lever, and a plurality of change levers mounted on a common axis and adaptedto regulate the movement of said locking bolt, said change levers being operable independently of, said master lever, the latter being operable alone to actuate all of said levers are in the proper position to allow change levers, said bolt lever having an insuch movement of the bolt, said bolt having 10 cline slot whereby it. is slidably mounted on a recess therein to receive the corresponda stud of said casing, said bolt lever being ing arm of said bolt lever, a pin located in connected to said bolt and having a bearthe bolt i s recess pt d g ge ing surface adapted to be engaged by suitperforation in the bolt lever.

able change and master keys for retracting In testimony whereof I affix my signature.-

v said bolt from said shackle when the change i SAMUEL R. FRAIM. 

